Speculation abounds about the worm, ostensibly designed to disrupt power grids and other such industrial facilities. Was it, in fact, aimed at Iran's nuclear industry? And if so, who's behind it? The U.S.? Israel? What's known and what's not? CNET takes a look.

We pit the newly-released Picasa with facial recognition against Apple's iPhoto, and Microsoft's Windows Live Photo Gallery software to see which one did the best job at recognizing faces, and making it easier to organize big photo libraries.